Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"continuous-flow reactor"”.
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High-Throughput Synthesis of Metal–Organic Frameworks in a Continuous Flow Reactor
… the high cost of synthesis in traditional batch reactors that use excess solvents, require long crystallization times, suffer from low yields and intrinsic inefficiencies in heat/mass transfer processes. This thesis focuses on developing low-cost, high-throughput and energy-efficient synthesis …
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Disinfection of secondary treated sewage by chlorine in a continuous flow reactor
… disinfect secondary treated sewage in a continuous flow reactor. Trickling-filter, clarified effluent collected prior to chlorination at the plant site was filtered sterilized and inoculated with two bacteria commonly found in sewage--Escherichia coli and Streptococcus faecalis. Eight …
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Regrowth of E. coli and S. faecalis in treated sewage after chlorination in a continuous-flow reactor
… secondary-treated sewage effluent using a continuous flow system. Regrowth was evaluated at varying chlorine contact times and chlorine residuals. In addition, chemical and physical characteristics of the sewage were evaluated in relation to regrowth. The results showed that while a 99% …
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Analysis of carbonaceous solid deposits from thermal stressing of FAMEs and FAME/diesel blends at different temperatures in a continuous flow reactor
… early stage deposits, formed in laboratory reactors, in particular a flow reactor. This was performed in order to gain insight into the processes by which these deposits form and what factors influence their formation. A flow reactor and closed sand bath reactor were employed to produce …
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An Integrated Process for Catalytical Conversion of Simple Sugars into Platform Chemicals, HMF and FDCA: Catalysis, Continuous Flow Reactor Design, Valorization of Waste By-Product
… and stability were rigorously evaluated in batch reactors. The performance and long-term stability of the catalysts under continuous operation were also assessed to determine their viability for practical applications. Key experimental parameters, including reaction temperature, feed flow rate, …
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Continuous flow platforms for the synthesis of high-quality semiconductor nanocrystals
… their application on a commercial scale. Continuous flow synthesis can be an alternative approach that may enable high throughput and superior control of particle size and quality. However, since its first application in the early 2000s, most of the literature remains focused on continuous …
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Synthesis of highly substituted benzo-fused nitrogen heterocycles via tandem benzannulation/cyclization strategies
… of the diazo ketones using a batch or continuous-flow reactor leads to the formation of vinylketenes via a photo-Wolff rearrangement. The vinylketenes then react with ynamides via a pericyclic cascade process to produce highly substituted aniline derivatives. Using this …
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Heavy metal removal from bilge water by electrocoagulation treatment
… using Electrocoagulation (EC) technique in a continuous flow reactor with a synthetic bilge water emulsion; and additionally, to discuss the operation cost of the treatment. The optimal configuration for EC treatment used combined electrodes, aluminum and carbon steel; flow rate of 1 L/min; …
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Enantioselective synthesis of pretomanid & investigations of Raman spectroscopy for through-tube monitoring of reactions
… Monitoring of Reactions [color illustrations] Continuous-flow chemistry has seen expansive growth and thus requires powerful new analytical techniques. The current commonly-used analytics involve inline analysis at a single point, which can hinder analysis. In this report, we demonstrate the …
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Engineering polymeric hollow fiber membrane reactors for sustainable chemical transformation reactions
“Over the past decade, laboratory-scale continuous-flow processes have witnessed explosive developments and have attracted a great deal of interest with respect to the significance of the economic and environmentally-sustainable production of pharmaceuticals, fine chemicals, and agrochemicals, as …
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The use of immobilised crown ethers as in-situ protecting groups for organic synthesis within flow reactors
… of organic protocols conducted in micro and continuous flow reactors. Utilising the high surface to volume ratio obtained under these reaction conditions, greater reaction control of many common and specialised organic syntheses has been reported. Building upon literature precedent, the work …
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Thermal and chemical analysis of carbonaceous materials: diesel soot and diesel fuel reactor deposits
… was degraded in three reaction vessels, viz. a continuous flow reactor, open glass flask s and closed metal reactors (bombs) in an attempt to synthesise carbonaceous deposits, analogous to those found in diesel injectors. The degradation of four diesel fuels, viz. an EN590 reference diesel, a …
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Development of a Novel TiO2-polymeric Photocatalyst for Water Purification both under UV and Solar illuminations
… observed. The effects of initial concentration, flow rate, pH, light intensity, photocatalyst loading, and thickness of the film on the degradation rates were studied. Mechanism of degradation of aspirin was studied from LC/MS analysis. The TOC analysis was carried out to analyse the organic …
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Mechanistic Understanding of the NOB Suppression by Free Ammonia Inhibition in Continuous Flow Aerobic Granulation Bioreactors
A partial nitritation-anammox continuous flow reactor (CFR) was operated for eight months demonstrating that a mixture of large anammox-supported aerobic granules (ASAGs) and small conventional aerobic granules (CAGs) can be maintained stably for extended periods of time. The influent NH4+ was kept …
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Physicochemical and biological treatability study of textile dye wastewater
… was attempted on several waste streams in continuous flow and batch tests. Batch tests indicated that the combined waste stream did not require the addition of supplemental nutrients for biological treatment and that at least a five day hydraulic residence time (HRT) was needed for maximum …
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An Investigation of the Biochemistry of Biological Phosphorus Removal
… removal (BPR) capability was cultivated in continuous flow reactor (CFR) systems, configured as either University of Cape Town (UCT) and anoxic/oxic (A/O) systems. Following an acclimation period at 20°C, low temperature stress (5°C) was imposed on one UCT system for investigation of the …
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Degradation of the Insensitive Munitions Compound 3-Nitro-1,2,4-triazol-5-one (NTO) via Sequential Reducing-Oxidizing Conditions
… and ATO removal were also achieved in an aerated continuous flow reactor using soil as the inoculum. An excess of pyruvate was added to the medium to promote oxygen consumption through the microbial biofilm allowing for simultaneous NTO reduction and ATO oxidation. In addition, enrichment cultures …
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Exploring hydrothermal reactions : from prebiotic synthesis to green chemistry
… were performed. These were carried out in a continuous flow reactor, allowing for precise control of reaction conditions and kinetics measurements. In most experiments a temperature of 200 °C in combination with a pressure of 100 bar was chosen. In some cases the temperature was even raised …
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Elucidating the Role of Toxin-Induced Microbial Stress Responses in Biological Wastewater Treatment Process Upset
… from activated sludge sequencing batch reactors relative to unstressed controls, but there was no additional increase in GroEL levels. Stress proteins may serve as sensitive and rapid indicators of mixed liquor toxicity which can adversely impact treatment process performance, but GroEL …
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Selective oxidation of methane in a trickle bed reactor over a platinum-based catalyst
… Since the role of liquid water in a single continuous-flow reactor has not been well established, evaluating its effect on catalytic performance and product selectivity in the direct conversion of methane over platinum-based catalysts was the prime focus of this research. Therefore, a …
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